KR20150028436A - Apparatus and method for calculating connection possible capacity of distributed generator - Google Patents

Abstract

Disclosed are an apparatus and a method for calculating a connectable capacity of a distributed generator, which calculate a maximum capacity of the distributed generator which can be connected under a technological standard. The apparatus for calculating a connectable capacity of a distributed generator comprises: an information collection unit which collects information on distributed generators and a power distribution system; an initial capacity calculation unit which calculates an initial capacity of a new distributed generator which can be connected to the power distribution system under a technological standard based on the collected information; a voltage calculation unit which calculates a maximum voltage value in case previously installed distributed generators and the new distributed generator having the initial capacity generate power to the maximum extent; and a final capacity calculation unit which calculates a final capacity of the new distributed generator, which is a connectable maximum capacity of the new distributed generator, by changing the initial capacity based on a base voltage that is calculated in case of maximum generation of the previously installed distributed generators, for the maximum voltage value to correspond to a preset upper-limit voltage value that was set as the upper-limit voltage of a power distribution line.

Description

[0001] APPARATUS AND METHOD FOR CALCULATING CONNECTION POSSIBLE CAPACITY OF DISTRIBUTED GENERATOR [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to an apparatus and method for calculating a distributed power supply capable capacity. More particularly, the present invention relates to an apparatus and method for calculating the capacity of a distributed power source capable of automatically calculating a maximum capacity of a newly installed dispersed type power source capable of linking a newly installed distributed power source to a power distribution system.

Electrical energy accounts for a growing proportion of the ever-increasing energy consumption, and the installation of new generation and transmission facilities is constrained by environmental and cost issues.

As a method for solving such a problem, distributed power generation technology is attracting attention.

A distributed power source is a facility capable of supplying power to operate a load connected to a power system separately from the main power generator installed in the power system. Such a distributed power source has a short construction period and a peak load And the transmission loss is low.

In order to connect these distributed power sources to the distribution system, submit information on the capacity and location of the distributed power source, examine whether the distributed power capacity can be linked to the distribution system, have.

The technology review of the distributed power supply will consider whether the appropriate voltage is exceeded and whether the protection cooperation is abnormal. In case of the protection cooperation problem, it may be possible to replace the protection device with the directional protection device suitable for the distributed power line, but if the problem exceeds the proper voltage, the capacity of the distributed power source is substantially limited.

Therefore, whether or not an appropriate voltage deviates from the distribution line is determined as a decisive criterion in the step of determining whether or not the distributed power source can be connected.

If a distributed power source of a certain capacity is applied to an arbitrary point to a specific power distribution line, the connection is approved if the appropriate voltage is not exceeded in the power distribution line through the calculation of the algae. If it exceeds the proper voltage, And measures should be taken.

However, if the customer asks about the capacity available for a specific line without presenting the specific capacity to be accessed, the person in charge should calculate the capacity of the distributed power source which is at the upper limit of the voltage.

At this time, the capacity of the distributed power source should be continuously increased by using the technical review tool (Off-DAS), and the capacity of the upper voltage limit should be manually calculated. Therefore, practitioners are cumbersome and repetitive, which is time-consuming and frustrating to guide customers.

In addition, according to the government's policy to promote renewable energy, applications for distributed power sources are increasing rapidly. However, in the case of a certain distribution line, there is a case where a distributed distributed power source is difficult to connect newly because a distributed power source already has a lot of connections.

However, since this information is not communicated to the operator in advance, the operator may purchase the site, establish all business plans, even build a decentralized power source and be rejected in the final grid access application.

This leads to civil complaints and, in the case of business operators, leads to enormous economic losses. Therefore, there is a need for a method that can calculate the capacity that can be newly connected by taking into consideration the capacity of the distributed power source according to a specific linkage point by distribution line in advance, and a software or information It is necessary to construct a delivery system.

In the related art of the present invention, Korean Patent Publication No. 2011-0129681 exists.

An object of the present invention is to provide a distributed power supply system capable of grasping the capacity of a distributed power supply in a power distribution system and automatically comparing the capacity of a distributed power supply that can be connected in a current state with a maximum connectable capacity of a bank and a power distribution line It is possible to calculate automatically.

It is also an object of the present invention to provide an electric power supply system and a power supply control method for an electric power generation system in which, in an iterative calculation for estimating a capacity of a newly distributed distributed power supply reaching a voltage upper limit value, And a voltage proportional relation between the voltage and the voltage upper limit value.

It is another object of the present invention to provide a method and apparatus for estimating the capacity of a newly distributed distributed power source capable of effectively calculating the capacity of a new distributed power source It is possible.

According to an aspect of the present invention, there is provided an apparatus for calculating a distributed power source capable capacity according to the present invention includes an information collecting unit for collecting information on a distributed power source and a power distribution system, An initial capacity calculating unit for calculating an initial capacity which is a capacity of a newly installed dispersed type power source capable of being connected, an estimated distributed type power source, and a new distributed type power source having the initial capacity, calculates a voltage for calculating a maximum voltage value And converting the initial capacity based on a base voltage value calculated assuming a case where the maximum power generation rate of the distributed distributed type power supply is maximized so that the maximum voltage value corresponds to a predetermined upper limit voltage value by the upper limit voltage to the power distribution line, And a final capacity calculation unit for calculating a final capacity which is the maximum capacity that can be connected to the newly distributed power supply.

At this time, the information collecting unit collects the main transformer delivery voltage and the distribution line from the Substation Operating Results Management System (SOMAS), which is a supervisory control data acquisition (SCADA) And a voltage and load information collecting unit for collecting information on the minimum load.

At this time, the information collecting unit collects distribution system information, which collects information on a distribution system including at least one of configuration of a distribution line from a distribution automation system (DAS), distribution automation system, Section.

In this case, the information collecting unit may include a distributed power source information collecting unit for collecting distributed power source information from the user input to the initial distributed power source and the newly distributed power source.

In this case, the initial capacity calculation unit may include a bank-unit initial capacity calculation unit that calculates an initial capacity of a new distributed power source capable of being linked based on a bank unit to which a plurality of distribution lines are allocated.

At this time, the bank-unit initial capacity calculating section calculates the capacity obtained by subtracting the existing distributed power source capacity existing at each node of the bank to which the new distributed power source is connected from the bank-based distributed power source- The unit initial capacity can be calculated.

In this case, the initial capacity calculation unit may include a distribution line unit initial capacity calculation unit for calculating an initial capacity of the newly distributed distributed power source that can be linked based on the distribution line unit.

At this time, the unit initial capacity calculation unit of the distribution line calculates the unit initial capacity calculation unit by subtracting the capacity of the distributed power source existing at each node of the distribution line power supply capacity to be connected with the new distributed power source, The capacity can be calculated as a unit initial capacity as a distribution line.

At this time, the initial capacity of the bank unit calculated from the bank unit initial capacity calculation unit is compared with the unit initial capacity of the distribution line calculated from the unit initial capacity calculation unit as the distribution line, and the initial capacity And a determination section.

At this time, the voltage calculation unit calculates a voltage for each node existing in the distribution line by performing algae calculation on the assumption that the existing distributed type power source is maximally generated based on the information collected from the information collection unit And may include an unreleased voltage calculation unit.

At this time, the voltage calculation unit calculates a voltage for each node existing in the distribution line by performing the algae calculation on the assumption that the new dispersed type power source having the initial capacity and the existing distributed type power source achieve maximum power generation And a voltage calculation unit.

In this case, the final capacity calculation unit may include an analysis unit that compares the maximum voltage value, which is the maximum voltage among the voltages of the nodes calculated from the coupled reflected voltage calculation unit, with the upper voltage value.

In this case, if the analysis unit determines that the maximum voltage value is larger than the upper limit voltage value, the initial capacity, the maximum voltage value, and the maximum voltage among the voltages calculated by the non- And a conversion unit for converting the initial capacity based on the base voltage value and the upper voltage value.

를 기반으로 상기 초기 용량을 변환하고, 상기 Y는, 상기 초기 용량 산출부에서 산출된 초기 용량 또는 변환 전의 용량이며, 상기 X는, 상기 초기 용량 또는 상기 변환 전의 용량을 변환한 후의 용량이며, 상기 V_max 는 상기 최대 전압 값이며, 상기 V_ref 는, 상기 상한 전압 값이며, V_base(n)은 상기 베이스 전압 값일 수 있다.At this time,

Wherein Y is the initial capacity or the capacity before conversion calculated by the initial capacity calculating unit and X is a capacity after converting the initial capacity or the capacity before conversion, V _max Is the maximum voltage value, V _ref Is the upper limit voltage value, and V _base (n) may be the base voltage value.

In this case, the final capacity calculation unit may determine that the initial capacity is the final capacity which is the maximum capacity that can be connected to the newly distributed distributed power supply, when the analysis unit analyzes the case that the maximum voltage value is equal to or less than the upper limit voltage value Section.

At this time, it may further include a display unit for displaying the final capacity calculated by the final capacity calculating unit.

At this time, the display unit can display the final capacity for each node of the distribution line through the single line or display the final capacity for each node of the distribution line through the report format.

According to another aspect of the present invention, there is provided a distributed power supply link capacity calculation method, comprising: collecting information on a distributed power supply and a power distribution system; Calculating an initial capacity which is a capacity of a connectable new dispersed type power supply, calculating a maximum voltage value on the assumption that an established distributed type power supply and a newly dispersed type power supply having the initial capacity have maximum power generation, By converting the initial capacity based on the base voltage value calculated assuming that the existing distributed type power supply is maximally generated so that the value corresponds to the upper limit voltage value set by the upper limit voltage to the power distribution line, And calculating a final capacity which is the maximum capacity that can be linked.

The calculating of the initial capacity may include calculating an initial capacity of the newly distributed distributed power supply capable of being linked based on the bank unit to which the plurality of power distribution lines are allocated, And calculating an initial capacity of the battery.

In this case, the step of calculating the initial capacity of the newly distributed distributed power source capable of being linked based on the bank unit may include a step of calculating, at each of the nodes of the banks to which the new distributed power source is connected, The capacity obtained by subtracting the existing distributed power source capacity present can be calculated as the bank-unit initial capacity.

At this time, the step of calculating the initial capacity of the newly distributed distributed power source that can be linked to the power distribution line by unit can be performed by calculating the initial capacity of the distributed distributed power source, The capacity obtained by subtracting the capacity of the existing distributed power source existing at each node can be calculated as a capacity per unit initial capacity by the power distribution line.

In this case, the calculated initial capacity of the bank unit may be compared with the unit initial capacity of the calculated distribution line to determine a smaller value as the initial capacity.

The calculating of the maximum voltage value may include calculating the maximum voltage value based on the information collected in the step of collecting the information, And calculating an unacknowledged voltage that yields a voltage per node.

At this time, the step of calculating the maximum voltage value may include calculating the maximum voltage value by calculating the voltage of each node existing in the distribution line by performing the algae calculation on the assumption that the new dispersed type power source having the initial capacity and the previously- And a step of calculating the reflected voltage.

The calculating of the final capacity may include comparing the maximum voltage value, which is the maximum voltage among the voltages calculated by the node, calculated in the calculating of the coupled reflected voltage, with the upper limit voltage value.

The calculating of the final capacity may further include calculating the initial capacity, the maximum voltage value, and the unlinked unlinked voltage when the maximum voltage value is greater than the upper limit voltage value after the comparing step And converting the initial capacity based on the base voltage value, which is the voltage of the same node as the node having the maximum voltage value, and the upper voltage value.

At this time, the calculating of the final capacity may be performed after the comparing, when the maximum voltage value is equal to or lower than the upper limit voltage value, the initial capacity is determined as the final capacity which is the maximum capacity that can be connected to the new distributed power source The method comprising the steps of:

At this time, after calculating the final capacity, the final capacity estimated in the step of calculating the final capacity may be displayed by displaying the final capacity for each node of the distribution line through the single line, The final capacity may be displayed.

According to the present invention, the capacity of the distributed power source is grasped in the power distribution system, and the capacity of the distributed power source that can be linked in the current state is automatically compared with the maximum connectable capacity of the bank and the power distribution line automatically specified in the technical standard .

Further, according to the present invention, in the iterative calculation for estimating the capacity of the newly dispersed type power source reaching the voltage upper limit value, the combined capacity of the existing distributed type power source, the combined capacity of the newly distributed type power source, It is possible to provide a proportional relationship between the previous voltage and the voltage upper limit value.

Further, according to the present invention, by using the method of re-sizing the capacity of the newly dispersed type power source capable of being linked, the number of times of repeated calculation can be greatly reduced and the amount of calculation can be reduced.

1 is a view for explaining a configuration of a distribution system for banks and distribution lines to which distributed power sources are to be connected.
2 is a block diagram of a distributed power supply link capacity determining apparatus according to the present invention.
FIG. 3 is an embodiment of an information collecting unit of the distributed power source link capacity calculation apparatus according to the present invention.
FIG. 4 is an embodiment of an initial capacity calculation unit of the distributed power supply link capacity calculation apparatus according to the present invention.
FIG. 5 shows an embodiment of a voltage calculation unit of the distributed power supply link capacity calculation apparatus according to the present invention.
FIG. 6 is a diagram for explaining calculation of a base voltage in an unacknowledged voltage calculation unit of the voltage calculation unit; FIG.
FIG. 7 is a graph showing the voltage of the distribution line calculated by performing the algae calculation on the assumption that the unperturbed voltage calculation unit assumes the maximum power generation of the distributed power source.
8 is a graph showing the voltage of the distribution line calculated by performing the algae calculation on the assumption that the newly added distributed type power source and the normally distributed type power source are maximally generated in the voltage calculation unit of the voltage calculation unit.
9 is an example of a final capacity calculating unit of the distributed power supply link capacity calculating apparatus according to the present invention.
FIGS. 10 to 16 are diagrams for explaining a process of calculating the final capacity according to the distributed power supply link capacity calculation apparatus according to the present invention.
17 is a graph showing a result of verifying the final capacity calculated by the distributed power supply link capacity calculation apparatus according to the present invention through off-DAS.
FIG. 18 and FIG. 19 show an embodiment of the display unit of the distributed power supply link capacity calculation apparatus according to the present invention.
20 is a flowchart of a distributed power supply link capacity calculation method according to the present invention.
21 is a diagram for explaining a process of calculating an initial capacity in the distributed power supply link capacity calculation method according to the present invention.
FIG. 22 is a diagram for explaining a process of converting the initial capacity and determining the final capacity in the distributed power source linkable capacity calculation method according to the present invention.

The present invention will now be described in detail with reference to the accompanying drawings. Hereinafter, a repeated description, a known function that may obscure the gist of the present invention, and a detailed description of the configuration will be omitted.

Embodiments of the present invention are provided to more fully describe the present invention to those skilled in the art.

Accordingly, the shapes and sizes of the elements in the drawings and the like can be exaggerated for clarity.

Hereinafter, a configuration of a bank and a distribution line to which a distributed power source is connected will be described before explaining an apparatus and a method for calculating a distributed power source capable capacity according to the present invention.

1 is a view for explaining a configuration of a distribution system for banks and distribution lines to which distributed power sources are to be connected.

Referring to FIG. 1, a distribution system includes a bank 1000 as a concept including a plurality of distribution lines based on a single substation, a plurality of distribution lines exist in the bank 1000, Circuit breakers (CB) 1100, 1200, and 1300, respectively.

Hereinafter, a plurality of distribution lines will be described separately with reference to corresponding circuit breakers (CB) 1100, 1200, and 1300.

Also, a plurality of distribution lines included in the bank 1000 are collectively referred to as a distribution system.

The first node 1, the second node 2 and the third node 3 are present in the distribution line in which the breaker 1100 is present and the fourth node 4, The fifth node 5 and the sixth node 6 are present and the seventh node 7, the eighth node 8 and the ninth node 9 are present in the distribution line where the breaker 1300 exists.

Switches are present between the circuit breakers 1100, 1200, and 1300 or the first to ninth nodes 9 to 9, and the distributed power sources may be installed in the first to ninth nodes.

At this time, the already dispersed type power source that is already connected is called an existing distributed type power source, and the distributed type power source to be newly installed is called a newly distributed type power source.

There is an existing distributed power source 10 at the first node 1 of the distribution line where the circuit breaker 1100 exists and the existing distributed power source 50 exists at the fifth node 5 of the distribution line where the circuit breaker 1200 exists , And there is a distributed power source 80 at the eighth node 8 of the distribution line where the circuit breaker 1300 exists.

Further, the newly distributed power source 2 is present at the second node 2 of the distribution line in which the circuit breaker 1100 exists.

Therefore, when calculating the maximum capacity at which the new distributed power source 20 can be connected to the second node 2, the distribution line 2000 to which the new distributed power source 20 belongs and the distribution line 2000), which is a superordinate concept.

Furthermore, the present invention is not limited to estimating the capacity with which a new distributed power source can be connected to any one of the nodes, and it is possible to estimate the capacity at which the newly distributed distributed power sources can be simultaneously connected to all the nodes .

Hereinafter, a distributed power supply link capacity determining apparatus according to the present invention will be described.

2 is a block diagram of a distributed power supply link capacity determining apparatus according to the present invention.

2, the distributed power supply link capacity calculation apparatus according to the present invention includes an information collecting unit 110 for collecting information on a distributed power supply and a power distribution system, An initial capacity calculating unit 120 for calculating an initial capacity which is a capacity of a newly installed distributed power source capable of being linked on the technical standard, a new distributed power source having an initial distributed capacity and an initial distributed capacity, A voltage calculating unit 130 for calculating a voltage value and a base voltage value calculating unit 130 for calculating a maximum voltage value based on the assumption that the maximum distributed power source is maximally generated so that the maximum voltage value corresponds to a predetermined upper- And a final capacity calculating unit 140 for calculating the final capacity which is the maximum capacity that can be connected to the new distributed power source by converting the initial capacity do.

At this time, the final capacity calculation unit 140 may further include a display unit 150 for displaying the final capacity calculated by the final capacity calculation unit 140.

FIG. 3 is an embodiment of an information collecting unit of the distributed power source link capacity calculation apparatus according to the present invention.

The information collecting unit 110 collects information on the distributed power source and the power distribution system.

3, the information collecting unit 110 includes a voltage and load information collecting unit 113, a power distribution system information collecting unit 115, and a distributed power information collecting unit 117. [

The voltage and load information collecting unit 113 collects the voltage and load information of the substation operating results management system (SOMAS), which is a supervisory control data acquisition system (SCADA) 112 to collect information on the main transformer delivery voltage and the minimum load on the distribution line.

That is, the substation main transformer sending voltage and power line drawn-out power amount data provided by the scada 111 or the small maas 112 are extracted to calculate the minimum load of the distribution line, and information .

The distribution system information collecting unit 115 collects information about a distribution system including at least one of the configuration of the distribution line from the distribution automation system (DAS) 114, which is the distribution automation system, .

The distributed type gath information collecting unit 117 collects distributed type power source information from the user input 115 for the initial distributed type power source and the newly distributed type power source.

The distributed power source information includes both the information of the normally distributed power source and the information of the newly distributed power source.

Specifically, the number, location (node), capacity, and the like in which the distributed distributed power source is installed can be provided from the user input 115, and the location (node) to which the new distributed power source is to be connected can be provided.

In addition, the maximum capacity that can be connected to the distributed power source within the bank unit specified in the technical standard, and the maximum capacity that can be associated with the distributed power source within the power line unit specified in the technical standard, Can be provided.

Specifically, the maximum allowable capacity capable of coupling a distributed power source to a single bank and the maximum capacity capable of connecting a distributed power source to a single power distribution line are input.

For example, a maximum allowable capacity for connecting a distributed power source to a single bank may be 20 MW, and a maximum capacity for connecting a distributed power source to a single power distribution line may be 10 MW.

FIG. 4 is an embodiment of an initial capacity calculation unit of the distributed power supply link capacity calculation apparatus according to the present invention.

The initial capacity calculation unit 120 calculates an initial capacity which is a capacity of a new distributed power source capable of being linked to a technical standard on the distribution system based on the information collected from the information collection unit 110.

4, the initial capacity calculation unit 120 includes a bank unit initial capacity calculation unit 121, a distribution line unit initial capacity calculation unit 122, and an initial capacity determination unit 123.

The apparatus 100 for calculating a distributed power supply capable capacity according to the present invention is intended to calculate a capacity that can be connected to a new distributed power supply. The finally calculated capacity is referred to as a final capacity, and a process for calculating the final capacity The initial capacity required in the system is called the initial capacity.

Specifically, the final capacity means the maximum capacity to which the new distributed power source can be connected.

Further, the initial capacity may be converted by the final capacity calculation unit 140, which will be described later, and is determined as the final capacity when the initial capacity meets certain requirements to be described later.

That is, the initial capacity is repeatedly converted through an equation described later, and the final capacity is determined when the predetermined requirement is satisfied.

The bank-unit initial capacity calculating unit 121 calculates the initial capacity of the newly distributed distributed power supply that can be linked based on the bank unit to which a plurality of distribution lines are allocated.

1, when the user inputs that the new distributed power source 20 is to be connected to the second node 2, the distribution line 2000 in which the second node 2 exists is assigned And calculates the initial capacity of the newly distributed distributed power supply capable of being linked based on the unit of the bank 1000 that is being used.

Specifically, the bank-unit initial capacity calculating section 121 calculates the bank-unit initial capacity calculating section 121 based on the bank-based distributed power-source-linkable capacity specified in the technical standard, minus the reserve distributed power source capacity existing at each node of the bank to which the newly- The capacity is calculated as the initial capacity per bank.

For example, if the bank-based distributed power-link capacity specified in the technical standard is 20 MW and the total capacity of the distributed power sources connected to the bank 1000 is 7.4 MW through user input, The capacity is 12.6 MW.

The power line based initial capacity calculation unit 122 calculates the initial capacity of the newly distributed power source that can be linked based on the power line unit.

1, when the user inputs that the new distributed power source 20 is to be connected to the second node 2, a unit of the distribution line 2000 in which the second node 2 exists And calculates the initial capacity of the newly distributed distributed power supply that can be connected as a reference.

Specifically, the power-distribution-unit initial capacity calculation unit 122 calculates the power-generation-unit initial capacity calculation unit 122 based on the power distribution capacity of the distributed power source specified by the technical standard, The capacity obtained by subtracting the capacity is calculated as the initial capacity per bank.

For example, if the unit distributed type power supply linkable capacity specified by the technical standard is 10 MW and the total capacity of the distributed power sources connected to the power distribution line 2000 is 2.35 MW through user input, And the initial capacity per unit is 7.65 MW.

The initial capacity determination unit 123 compares the bank initial capacity calculated from the bank-unit initial capacity calculation unit 121 with the unit initial capacity of the distribution line calculated from the unit initial capacity calculation unit 122 as the distribution line And determines a smaller value as the initial capacity.

For example, the initial capacity of the bank unit is 12.6 MW and the unit initial capacity of the distribution line is 7.65 MW.

At this time, the initial capacity determining unit 123 determines the unit initial capacity of the distribution line, which is a smaller value among the bank-unit initial capacity of 12.6 MW and the unit initial capacity of the distribution line as 7.65 MW, as the initial capacity.

Hereinafter, the voltage calculation unit of the distributed power supply link capacity calculation apparatus according to the present invention will be described.

FIG. 5 shows an embodiment of a voltage calculation unit of the distributed power supply link capacity calculation apparatus according to the present invention. FIG. 6 is a diagram for explaining calculation of a base voltage in an unacknowledged voltage calculation unit of the voltage calculation unit; FIG. FIG. 7 is a graph showing the voltage of the distribution line calculated by performing the algae calculation on the assumption that the unperturbed voltage calculation unit assumes the maximum power generation of the distributed power source. 8 is a graph showing the voltage of the distribution line calculated by performing the algae calculation on the assumption that the newly added distributed type power source and the normally distributed type power source are maximally generated in the voltage calculation unit of the voltage calculation unit.

The voltage calculating unit 130 calculates a maximum voltage value on the assumption that the power distributing type power source having the initial distributed capacity and the power distribution having the initial capacity is maximally generated.

Here, the maximum voltage value refers to a voltage value through calculation of algae assuming that the new distributed power source having the initial distributed capacity and the initial distributed power source generate the maximum power. Specifically, it is a voltage value of a node having the highest voltage value among the voltage values calculated by the algae calculation on the assumption that the existing distributed power source and the new distributed power source having the initial capacity are maximally generated.

The reason for calculating the maximum voltage value at this time is that if the maximum voltage value does not exceed the upper limit voltage value to be described later, it can be determined that all the nodes do not exceed the upper limit voltage value.

Referring to FIG. 5, the voltage calculating unit 130 includes an unacknowledged voltage calculating unit 131 and a coupled reflected voltage calculating unit 132. FIG.

The term "unconnected connection" means a state in which the connection of the new distributed power source is not reflected in calculating the voltage.

The term "reflection" refers to a state in which the connection of the new distributed power source is performed in the calculation of the voltage. That is, all of the new distributed power sources and the existing distributed power sources are connected.

Based on the information collected from the information collecting unit 110, the unlinked uncollected voltage calculating unit 131 performs algae calculation on the assumption that the distributed distributed power source generates maximum power, And performs a function of calculating a star voltage.

1, for example, in a state before the new distributed power source is connected in the distribution line 2000 to which the newly distributed distributed power source 20 is connected, that is, Type power supply connection point.

Specifically, in order to calculate the voltages of the nodes 1, 2 and 3, which are the distributed power supply connection points when only the conventional distributed power source 10 is connected, Data and a minimum load are calculated and a bird's flow calculation is performed assuming a condition that the power 10 is maximally generated by using the transmission voltage of the bank 1000 which is an upper layer of the distribution line 2000.

6 and 7, it is possible to confirm the voltage value of each node of the distribution line to be connected to the new distributed type power source in a state where only the existing distributed type power source is connected.

Specifically, in FIG. 7, in the state where only the conventional distributed power source is connected, the voltage of each node of the power distribution line to which the new distributed power source is connected does not exceed the upper limit voltage value and has a voltage between 13175.5V and 13200.7V.

In this case, the upper limit voltage value means the upper limit value of the voltage allowed in the distribution line, which is the upper limit value of the voltage with the extra-high voltage distribution line. Specifically, it is 13486V.

The connection reflection voltage calculation unit 132 calculates the voltage for each node existing in the distribution line by performing algae calculation on the assumption that the new dispersed type power source having the initial capacity and the existing distributed type power source are maximally generating electricity .

1, for example, in a state where a new distributed power source is connected in a distribution line 2000 to be connected to a newly distributed distributed power source 20, that is, a state in which an existing distributed power source 10 and a newly distributed distributed power source 20 Are connected to each other, the voltage of the nodes (1,2,3), which is the distributed power supply connection point, is calculated.

Specifically, in order to calculate the voltages of the nodes 1, 2 and 3, which are the distributed power supply connection points when the conventional distributed power source 10 and the newly distributed distributed power source 20 are all connected, And uses the minimum load and delivery voltage information provided by the controller 110.

That is, in the distribution line for which a distributed power source is to be newly connected, the initial distributed capacity is maximally generated based on the minimum load and the operation delivery voltage condition, and the initial capacity calculated by the initial capacity calculation unit 120 The new distributed power source capacity is also used to calculate the tidal current under the conditions of the first generation.

Therefore, the initial capacity calculated by the initial capacity calculation unit 120 is set as the capacity of the newly distributed distributed power source, and by reflecting the state of maximum power generation of the distributed distributed power source, Voltage is calculated.

At this time, the voltage is calculated for each node of the distribution line to connect the new distributed power source.

Referring to FIG. 8, in the state where both the conventional distributed power source and the newly distributed distributed power source are connected, the voltage value of each node of the distribution line to be connected to the new distributed power source can be confirmed.

Specifically, in FIG. 8, in the state where both the conventional distributed power source and the newly distributed distributed power source are connected, the voltage of the power distribution line to be connected to the newly distributed power source has a voltage between 13136 V and 13890 V, ≪ / RTI >

That is, at a particular node, it exceeds the upper limit voltage value (13486V).

Therefore, the initial capacity of the newly distributed power supply should be re-calculated. That is, if the initial capacity calculated by the initial capacity calculation unit 120 is used as it is, the initial capacity calculated by the initial capacity calculation unit 120 is converted to the upper limit voltage, The voltage value of each node should not exceed the upper limit value in a state in which all of the new distributed power sources are connected.

A specific method of converting the initial capacity will be described later.

Hereinafter, the final capacity calculating section of the distributed power supply link capacity determining apparatus according to the present invention will be described.

9 is an example of a final capacity calculating unit of the distributed power supply link capacity calculating apparatus according to the present invention.

The final capacity calculation unit 140 may calculate a base voltage value based on the assumption that the maximum distributed power source is maximally generated such that the maximum voltage value corresponds to a predetermined upper limit voltage value of the distribution line, To calculate a final capacity that is the maximum capacity that can be connected to the new distributed power source by converting the initial capacity.

9, the final capacity calculation unit 140 includes an analysis unit 141, a conversion unit 142, and a determination unit 143. [

The analysis unit 141 performs a function of comparing the maximum voltage value, which is the maximum voltage among the voltages calculated by the connection reflected voltage calculation unit 132, with the upper limit voltage value.

If the analysis unit 141 determines that the maximum voltage value is larger than the upper limit voltage value, the conversion unit 142 may calculate the initial capacity, the maximum voltage value, the unlinked uncolored voltage calculation unit 131 And the base voltage value, which is the voltage of the same node as the node having the maximum voltage value, and the upper limit voltage value.

At this time, the conversion unit 142 can convert the initial capacity through the following equations (1) and (2).

In Equation (1), Y denotes an initial capacity calculated by the initial capacity calculation unit 120.

Specifically, it refers to a capacity of a newly distributed power source that can be linked on a technology basis to a power distribution system to which a new distributed power source is to be linked based on information collected from the information collection unit 110. That is, it is a value obtained by subtracting the capacity of the conventional distributed power source from the capacity that can be linked on the technical standard.

Also, V _max Means the maximum voltage value.

The maximum voltage value refers to a voltage value through calculation of algae assuming a case where a new distributed type power source having an initial distributed capacity and an initial distributed type power source generate maximum power. Specifically, it is a voltage value of a node having the highest voltage value among the voltage values calculated by the algae calculation on the assumption that the existing distributed power source and the new distributed power source having the initial capacity are maximally generated.

Further, V _ref Means the upper limit voltage value.

Specifically, the upper limit voltage value means the upper limit value of the voltage allowed in the distribution line, which is the upper limit value of the voltage with the extra-high voltage distribution line. It is usually 13486V. However, the upper limit voltage value may vary according to the technology development or policy.

V _base (n) means a base voltage value.

Specifically, the base voltage value is a value obtained by estimating the base current value based on information collected from the information collection unit 110 by the unlinked voltage calculation unit 131, The voltage value of each node existing in the distribution line is calculated. At this time, the voltage value of the same node as the node having the maximum voltage value among the voltages of the nodes.

That is, a node having the maximum value among the voltage values calculated by assuming the maximum power generation state is calculated by reflecting both the existing distributed power source and the newly distributed distributed power source.

At this time, it is assumed that the maximum power generation state is assumed by reflecting only the distributed distributed power source, and the voltage value of the same node as the node having the maximum value among the calculated voltage values of the nodes becomes the base voltage value.

X is a value obtained by converting the initial capacity Y, which means a capacity that can be connected to the new distributed power source.

Specifically, it means a capacity that can actually be linked in consideration of the initial capacity Y, which is a capacity that can be linked on the technical standards, and the constraint condition of the power distribution system.

In addition, X and Y are not fixed values. In the repeated change, the value before conversion is defined as Y, and the value after conversion is defined as X. [

Accordingly, the initial capacity Y, the maximum voltage value V _max , the maximum voltage value V _ref And converting the initial capacity Y to X with the base voltage value V _base (n).

Specifically, the equation (1) is the Y and X is (YX) and the V _max and V _ref, which is a difference in the difference-relationship between the (V _max V _ref) is the difference between V _ref and V _base (n) , (V _ref - V _base (n)) and the relation of X is proportional.

Equation (2) summarizes Equation (1) to calculate X. < EMI ID = 1.0 >

That is, X, the V _max is less than or _equal to the V _ref Can be obtained. When the initial capacity Y is changed a number of times, the capacity of the newly distributed distributed power source before conversion is Y and the capacity of the newly distributed distributed power source after conversion is X.

If the analysis unit 141 determines that the maximum voltage value is equal to or less than the upper limit voltage value, the determination unit 143 determines the initial capacity to be the final capacity that is the maximum capacity that can be connected to the new distributed power source Function.

Specifically, when the maximum value is equal to or greater than the upper limit voltage value, the conversion unit 142 repeatedly converts the initial capacity Y through the equations (1) and (2) as described above, Voltage value, the maximum capacity is determined as the final capacity because the initial capacity is the maximum capacity that can be connected to the newly distributed distributed power supply.

If the maximum voltage value is equal to or less than the predetermined difference from the upper limit voltage value, the determination unit 143 may determine that the initial value of the initial voltage is greater than the upper limit voltage value, The capacity can be determined by the final capacity which is the maximum capacity that can be connected to the new distributed power source.

For example, when the predetermined difference is 0.5, when the maximum voltage value is 13486.1V and the upper limit voltage value is 13486, the conversion unit 142 does not convert the initial capacity, And the final capacity, which is the maximum capacity that can be connected to the new distributed power source, can be determined.

Hereinafter, a process for estimating the final capacity by operating the distributed power supply linkable capacity calculating apparatus according to the present invention will be described.

FIGS. 10 to 16 are diagrams for explaining a process of calculating the final capacity according to the distributed power supply link capacity calculation apparatus according to the present invention.

Referring to FIG. 10, the initial capacity calculated by the initial capacity calculation unit 120 is 7640 KW. At this time, the maximum voltage value is 13890.2V, the upper limit voltage value is 13486V, and the base voltage value is 13175.5.

That is, it can be confirmed that the maximum voltage value exceeds the upper limit voltage value.

Therefore, the initial capacity should be converted through Equations 1 and 2 with the maximum voltage value, the upper voltage value, the base voltage value, and the initial capacity as variables.

Referring to FIG. 11, the initial capacity converted through Equations 1 and 2 using the parameters shown in FIG. 10 becomes 3324 KW.

At this time, based on the converted initial capacity, the maximum voltage value is 13531.7V, the upper limit voltage value is still 13486V, and the base voltage value is 13175.5.

That is, it can be confirmed that the maximum voltage value still exceeds the upper limit voltage value.

Therefore, the converted initial capacity should be repeatedly transformed through Equations 1 and 2 with the maximum voltage value, the upper voltage value, the base voltage value, and the converted initial capacity as variables.

Referring to FIG. 12, the initial capacity converted through Equations 1 and 2 using the parameters shown in FIG. 11 is 2897 KW.

At this time, based on the converted initial capacity, the maximum voltage value is 13490.2V, the upper limit voltage value is still 13486V, and the base voltage value is 13175.5.

That is, it can be confirmed that the maximum voltage value still exceeds the upper limit voltage value.

Therefore, the converted initial capacity should be repeatedly transformed through Equations 1 and 2 with the maximum voltage value, the upper voltage value, the base voltage value, and the converted initial capacity as variables.

Referring to FIG. 13, the initial capacity converted through Equations 1 and 2 using the parameters shown in FIG. 12 is 2858 KW.

At this time, based on the converted initial capacity, the maximum voltage value is 13486.3V, the upper limit voltage value is still 13486V, and the base voltage value is 13175.5.

That is, it can be confirmed that the maximum voltage value still exceeds the upper limit voltage value.

Therefore, the converted initial capacity should be repeatedly transformed through Equations 1 and 2 with the maximum voltage value, the upper voltage value, the base voltage value, and the converted initial capacity as variables.

Referring to FIG. 14, the initial capacity converted through Equations 1 and 2 using the parameters shown in FIG. 13 becomes 2856 KW.

At this time, based on the converted initial capacity, the maximum voltage value is 13486.1 V, the upper limit voltage value is still 13486 V, and the base voltage value is 13175.5.

That is, it can be confirmed that the maximum voltage value still exceeds the upper limit voltage value.

Therefore, the converted initial capacity should be repeatedly transformed through Equations 1 and 2 with the maximum voltage value, the upper voltage value, the base voltage value, and the converted initial capacity as variables.

Referring to FIG. 15, the initial capacity converted through Equations 1 and 2 using the parameters shown in FIG. 14 is 2855 KW.

At this time, based on the converted initial capacity, the maximum voltage value is 13486.1 V, the upper limit voltage value is still 13486 V, and the base voltage value is 13175.5.

That is, it can be confirmed that the maximum voltage value is equal to the upper limit voltage value.

Therefore, it is not necessary to convert the converted initial capacity again, and the converted initial capacity of 2855 KW is determined as the final capacity which is the maximum capacity that can be connected to the new distributed power source.

Referring to FIG. 16, the result of the initial capacity converted in the above embodiment can be confirmed.

The initial capacity calculated by the initial capacity calculation unit 120 is 7650 KW. However, it can be confirmed that the initial capacity is converted by repeating the maximum voltage value so as not to exceed the upper limit voltage value, and the converted initial capacity converges to 2855 KW.

That is, the final capacity, which is the maximum capacity with which the new distributed power source can be connected, is 2855 KW.

Hereinafter, a result of verifying whether the maximum voltage value does not exceed the upper limit voltage value based on the final capacity calculated according to the above embodiment will be described.

17 is a graph showing a result of verifying the final capacity calculated by the distributed power supply link capacity calculation apparatus according to the present invention through off-DAS.

Referring to FIG. 17, it can be confirmed that the maximum voltage value occurs at a node corresponding to a distance of 23.5 km from the substation, and the maximum voltage value does not exceed the upper limit voltage value.

Referring to FIG. 7, the initial capacity calculation unit 120 calculates an initial capacity of 7650 KW, and calculates a maximum voltage value with the initial capacity of 7650 KW. The maximum voltage value is 23.5 km at 13890.2V, and it can be confirmed that it exceeds the upper limit voltage value.

Referring to FIG. 8 together, the base voltage value is calculated at the same node as the maximum voltage value. Therefore, the base voltage value at the node corresponding to 23.5 km from the substation is 13175.5V.

Therefore, by converting the initial capacity through the above equations (1) and (2) using the calculated maximum voltage value of 13890.2V, the predetermined upper limit voltage of 13486V, the base voltage value of 13175.5V and the initial capacity of 7650KW , The final capacity is determined to be 2855 KW, and the maximum voltage value does not exceed the upper limit voltage value as shown in Fig.

That is, the fact that the maximum voltage value does not exceed the upper limit voltage value means that even though the final distributed capacity type power supply of 2855 KW and the deployed distributed power supply of the final capacity are supposed to be in the maximum power generation state, .

Hereinafter, the display unit of the distributed power supply link capacity determining apparatus according to the present invention will be described.

FIG. 18 and FIG. 19 show an embodiment of the display unit of the distributed power supply link capacity calculation apparatus according to the present invention.

The display unit 150 performs a function of displaying the final capacity calculated by the final capacity calculating unit 140.

At this time, the display unit 150 can display the final capacity for each node to the distribution line through the single line diagram, or display the final capacity for each node to the distribution line through the report format.

Referring to Fig. 18, the display unit 150 displays the final capacity for each node of the distribution line through the single-line drawing. In the power distribution system, there is a bank 1000 as a concept including a plurality of distribution lines based on a single substation, a plurality of distribution lines exist in the bank 1000, and each of the plurality of distribution lines includes a circuit breaker CB. Circuit breakers (1100, 1200, 1300).

The first node 1, the second node 2 and the third node 3 are present in the distribution line in which the breaker 1100 is present and the fourth node 4, The fifth node 5 and the sixth node 6 are present and the seventh node 7, the eighth node 8 and the ninth node 9 are present in the distribution line where the breaker 1300 exists.

Switches are present between the breakers 1100, 1200, 1300 or the first to ninth nodes 9,

There is an existing distributed power source 10 having a capacity of 2000 KW in the first node 1 of the distribution line where the circuit breaker 1100 exists and a new distributed distributed power source 20 having a capacity of 1500 KW in the second node 2. [ And it can be easily confirmed that a new distributed power source 30 having a capacity of 1000 KW can be connected to the third node (3).

Further, the new distributed power source 40 having a capacity of 1500 KW can be connected to the fourth node 4 of the distribution line where the circuit breaker 1200 is present, and the fifth distributed power source 40 having the capacity of 3000 KW It can be easily confirmed that the power source 50 is present and the new distributed power source 60 having a capacity of 1000 KW can be connected to the sixth node 6.

Further, a new dispersed type power source 70 having a capacity of 1000 KW can be connected to the seventh node 7 of the distribution line in which the breaker 1300 is present, and an eighth dispersed type power source 70 having a capacity of 3000 KW It can be easily ascertained that there is a power source 80 and that a new distributed power source 90 having a capacity of 800 KW can be connected to the ninth node 9.

Referring to Fig. 19, the display unit 150 displays the final capacity for each node of the distribution line through the report format.

Specifically, the distribution lines are distinguished based on the circuit breakers 1100, 1200, and 1300, and the locations to which the distributed power sources are to be connected are identified based on the number of the connection node to which the distributed power sources are connected. Can be displayed in a report format.

Hereinafter, the distributed power supply link capacity calculation method according to the present invention will be described.

The description of the distributed power supply link capacity calculation apparatus according to the present invention will be omitted.

20 is a flowchart of a distributed power supply link capacity calculation method according to the present invention. 21 is a diagram for explaining a process of calculating an initial capacity in the distributed power supply link capacity calculation method according to the present invention. FIG. 22 is a diagram for explaining a process of converting the initial capacity and determining the final capacity in the distributed power source linkable capacity calculation method according to the present invention.

Referring to FIG. 20, the distributed power supply link capacity calculation method according to the present invention includes collecting information on a distributed power supply and a distribution system (S100), and based on the collected information, (S110) of calculating an initial capacity which is a capacity of a newly-installed distributed power source capable of being linked on a reference basis, calculating a maximum voltage value on the assumption that a newly dispersed type power source having an initial distributed power source and an initial capacity In step S120, the initial capacity is calculated based on the base voltage value calculated on the assumption that the maximum distributed power source is maximally generated so that the maximum voltage value corresponds to the predetermined upper limit voltage value of the distribution line. A step S130 of calculating a final capacity which is the maximum capacity that can be connected to the new distributed power source by conversion, and a step S140 of displaying the calculated final capacity It should.

In step S100, information on the distributed power source and the power distribution system is collected. In particular, it is possible to estimate the minimum load from the main transformer output voltage and the distribution line from the Supervisory Control And Data Acquisition (SCADA), a supervisory control data collection system, or the Substation Operating Results Management System (SOMAS) Information can be collected.

In addition, it is possible to collect information on a distribution system including at least one of a distribution system from a distribution automation system (DAS) to a distribution line, a bulb, and a section load.

Also, distributed power source information for the conventional distributed power source and the newly distributed power source can be collected from the user input.

In step S110, based on the collected information, an initial capacity, which is a capacity of a newly distributed distributed power source capable of being linked to the power distribution system on a technical standard, is calculated.

Referring to FIG. 21, in operation S111, it is determined whether the bank-associated maximum capacity is equal to or greater than a bank-associated distributed power source in operation S111.

Here, the bank linkable maximum capacity is the maximum capacity of the distributed power supply that can be linked to the bank on the technical reference inputted by the user. The corresponding bank is a bank including distribution lines to be connected to the new distributed type power source. Therefore, the corresponding bank conventional distributed power source capacity means the total capacity of the distributed power source already associated with the bank to which the new distributed power source is to be connected.

If it is determined in step S110 that the bank-associated maximum capacity is smaller than the corresponding bank's existing distributed power source capacity, it is determined that the new distributed power source can not be connected to the corresponding bank (S112).

However, if it is determined in step S110 that the bank-associated maximum capacity is equal to or greater than the bank-previously-distributed power supply capacity, the bank-unit initial capacity A is calculated (S113). At this time, the calculating method is a value obtained by subtracting the bank pre-dispersion type power source capacity from the bank-related maximum capacity.

After step S113, it is determined whether or not the maximum connectable capacity at the power distribution line is greater than or equal to the at least one existing distributed power supply capacity for the power distribution line

Here, the maximum capacity that can be connected to the distribution line is the maximum capacity of the distributed type power source that can be connected to the distribution line on the technical standard inputted by the user. The corresponding distribution line is a distribution line to be connected to the new distributed type power source. Therefore, the above-mentioned distributed power source capacity for the distribution line means the total capacity of the distributed power source that is already connected to the distribution line to be connected to the newly distributed distributed power source.

If it is determined in step S114 that the maximum connectable capacity to the power distribution line is smaller than the previously allocated power supply capacity for the corresponding power distribution line, it is determined that the new distributed power source can not be connected to the corresponding power distribution line (S115).

However, if it is determined in step S114 that the maximum connectable capacity to the power line is equal to or greater than the previously allocated power source capacity for the corresponding power line, the unit initial capacity (B) is calculated from the power line (S116). At this time, the calculation method is a value obtained by subtracting the existing distributed power source capacity from the corresponding distribution line at the maximum connectable capacity by the distribution line.

In step S116 and subsequent steps, the bank unit initial capacity A calculated in step S113 and the distribution unit initial capacity B calculated in step S116 are compared with each other, Is greater than or equal to the unit initial capacity B (S117).

In this case, if the bank unit initial capacity A is smaller than the unit initial capacity B as the power distribution line, the bank unit initial capacity A is determined as the initial capacity (S118).

However, if the bank unit initial capacity A is equal to or greater than the unit initial capacity B as the power distribution line, the unit initial capacity B is determined as the initial capacity by the power distribution line (S119).

That is, the smallest value among the bank-unit initial capacity (A) and the unit initial capacity (B) by the power distribution line is determined as the initial capacity.

Hereinafter, steps S120 and S130 will be described with reference to FIG.

After Referring to FIG. 22, step S110, and calculates (S121) a maximum voltage value (V _max) is based on the initial capacity it is determined in the step S110.

After step S121, the base voltage value V _base is calculated (S122).

Thereafter, the maximum voltage value (V _max) and, as compared to the upper limit voltage value (V _ref), the maximum voltage value (V _max) is the upper limit voltage value (V _ref) to determine (S131 is less than or equal to ).

At this time, if the maximum voltage value V _max is less than or equal to the upper limit voltage value V _ref in step S131, the initial capacity is determined as the final capacity in step S132. Here, the initial capacity refers to the capacity of the new power source capacity reflected in calculating the maximum voltage value V _max .

If the maximum voltage value V _max is larger than the upper limit voltage value V _ref in step S131, the difference between the maximum voltage value V _max and the upper limit voltage value V _ref is It is judged whether it is smaller than the predetermined difference (0.5 V) (S133).

At this time, if the maximum voltage value V _max and the upper limit voltage value V _ref are smaller than the predetermined difference, the process proceeds to step S132 to determine the initial capacity as the final capacity.

However, if it is determined in step S133 that the maximum voltage value V _max and the maximum voltage value V _ref are greater than the predetermined difference, the initial capacity is converted (step S144).

In this case, as a method of converting the initial capacity, the above equations (1) and (2) are referred to.

When the initial capacity is converted in step S144, the flow proceeds to that based on the initial conversion capacity again repeated by calculating (S121) a maximum voltage value (V _max) method.

Therefore, the maximum voltage value V _max should be less than or equal to the upper limit voltage value V _ref , and the initial capacity should be converted to a value that is greater than or equal to the predetermined difference.

If the above condition is satisfied, the initial capacity is determined as the final capacity, and the final capacity means the maximum capacity to which the new distributed power source can be connected.

As described above, the apparatus and method for calculating a distributed power source capable capacity according to the present invention are not limited to the configuration and method of the embodiments described above, but the embodiments can be modified in various ways All or some of the embodiments may be selectively combined.

1,2,3,4,5,6,7,8,9: Node
10, 20, 30, 40, 50, 60, 70, 80, 90:
1000: Bank 2000: Distribution line
1100, 1200, 1300: Circuit breaker
100: Distributed power supply capacity calculation device
110: information collecting unit 113: voltage and load information collecting unit
115: Power distribution system information collection unit 117: Distributed power supply information collection unit
120: initial capacity calculation unit 121: bank-unit initial capacity calculation unit
122: Distribution line initial capacity calculation unit 123: Initial capacity determination unit
130: voltage calculation unit 131: unlinked voltage calculation unit
132: linkage reflection voltage calculation unit 140: final capacity calculation unit
141: Analysis section 142: Conversion section
143; Decision Unit 150:

Claims (28)

An information collecting unit for collecting information on the distributed power source and the power distribution system;
An initial capacity calculation unit for calculating an initial capacity, which is a capacity of a new distributed power source capable of being linked to the power distribution system on a technical basis, based on the collected information;
A voltage calculation unit for calculating a maximum voltage value on the assumption that a new distributed type power source having an initial distributed power source and an existing distributed power source assume maximum power generation; And
Wherein the initial capacity is converted based on a base voltage value calculated on the assumption that the maximum distributed power source generates the maximum power so that the maximum voltage value corresponds to a predetermined upper limit voltage value to the upper limit voltage to the power distribution line, Type power source, and a final capacity calculation unit for calculating a final capacity which is the maximum capacity that can be connected to the power source. The method according to claim 1,
The information collecting unit,
Collects information on the minimum load from the main transformer output voltage and power distribution line from Supervisory Control And Data Acquisition (SCADA), a monitoring and control data collection system, or Substation Operating Results Management System (SOMAS) And a voltage and load information collecting unit for collecting the voltage and load information. The method of claim 2,
The information collecting unit,
And a distribution system information collecting unit for collecting information on a distribution system including at least any one of a distribution system from a distribution automation system (DAS) to a distribution line, Type power supply capacity calculation device. The method of claim 3,
The information collecting unit,
And a distributed power source information collecting unit for collecting distributed power source information from the user input to the original distributed power source and the newly installed distributed power source. The method according to claim 1,
The initial capacity calculation unit calculates,
And a bank-unit initial capacity calculating unit for calculating an initial capacity of the newly distributed distributed power supply capable of being linked based on the bank unit to which a plurality of distribution lines are allocated. The method of claim 5,
The bank-unit initial capacity calculation unit calculates,
Based on the bank-based distributed power source capable capacity specified in the technical standard, a capacity obtained by subtracting the existing distributed power source capacity existing at each node of the bank to be connected with the newly distributed power source, Type power supply capacity calculation device. The method of claim 6,
The initial capacity calculation unit calculates,
And a distribution line unit initial capacity calculation unit for calculating an initial capacity of the newly distributed distributed type power source capable of being linked based on a distribution line unit. The method of claim 7,
The distribution line furnace initial capacity calculation unit calculates,
A capacity obtained by subtracting the capacity of the distributed power source existing at each node of the distribution line to be connected with the new distributed type power source from the distribution line type distributed power source capable capacity specified in the Technical Standard And a distributed power supply link capacity calculation device. The method of claim 8,
And an initial capacity determining unit that compares the unit initial capacity calculated by the bank unit initial capacity calculating unit with the unit initial capacity of the distribution line calculated by the unit initial capacity calculating unit as the distribution line to determine a smaller value as the initial capacity And the power source is connected to the power source. The method according to claim 1,
The voltage calculation unit calculates,
And an unlinked unreflected voltage calculation unit for calculating a voltage for each node existing in the distribution line by performing algae calculation on the assumption that the existing distributed type power source is maximally generated based on the information collected from the information collection unit Of the distributed power source capable capacity. The method of claim 10,
The voltage calculation unit calculates,
And a coherent reflection voltage calculation unit for calculating a voltage for each node existing in the power distribution line by performing algae calculation on the assumption that the new dispersed type power source having the initial capacity and the existing distributed power source are maximally generated Wherein the distributed power supply linkable capacity calculation device is a distributed power supply linkable capacity calculation device. The method of claim 11,
The final capacity calculation unit may calculate,
And an analyzer for comparing the maximum voltage value, which is the maximum voltage among the voltages calculated by the connection reflected voltage calculation unit, with the upper limit voltage value. The method of claim 12,
When the analysis unit analyzes the maximum voltage value as being larger than the upper limit voltage value,
The initial capacity, the maximum voltage value, the base voltage value which is the voltage of the same node as the node having the maximum voltage value among the voltages calculated by the unlinked voltage calculation unit and the upper limit voltage value, And a conversion unit for converting the power of the distributed power source capable capacity. 14. The method of claim 13,
Wherein,

To convert the initial capacity,
Y is the initial capacity or the capacity before conversion calculated by the initial capacity calculation unit, X is the capacity after the initial capacity or the capacity before conversion is converted, and V _max Is the maximum voltage value, V _ref Is the upper limit voltage value, and V _base (n) is the base voltage value. 14. The method of claim 13,
The final capacity calculation unit may calculate,
When the analysis unit analyzes the maximum voltage value as the case where the maximum voltage value is equal to or less than the upper limit voltage value,
And a determination unit that determines the initial capacity as a final capacity that is a maximum capacity that can be connected to the newly distributed distributed power supply. The method according to claim 1,
Further comprising a display unit for displaying a final capacity calculated by said final capacity calculating unit. 18. The method of claim 16,
The display unit includes:
Wherein the final capacity is displayed for each node of the distribution line through the single line or the final capacity is displayed for each node to the distribution line through the report format. Collecting information about the distributed power supply and distribution system;
Calculating an initial capacity which is a capacity of a new distributed power source capable of being linked to the power distribution system on a technical basis based on the collected information;
Calculating a maximum voltage value on the assumption that a new distributed type power source having an initial distributed capacity and an existing distributed type power source is maximally generated; And
Wherein the initial capacity is converted based on a base voltage value calculated on the assumption that the maximum distributed power source generates the maximum power so that the maximum voltage value corresponds to a predetermined upper limit voltage value to the upper limit voltage to the power distribution line, Type power source, and a final capacity that is a maximum capacity that can be connected to the power source. 19. The method of claim 18,
The step of calculating the initial capacity includes:
Calculating an initial capacity of a new distributed power source capable of being linked based on a bank unit to which a plurality of distribution lines are allocated; And
And calculating an initial capacity of the newly distributed distributed power supply capable of being linked based on a power distribution line unit. The method of claim 19,
Wherein the step of calculating the initial capacity of the newly distributed distributed power supply capable of being linked based on the bank unit comprises:
Based on the bank-based distributed power source capable capacity specified in the technical standard, a capacity obtained by subtracting the existing distributed power source capacity existing at each node of the bank to be connected with the newly distributed power source, Type power supply capacity calculation method. The method of claim 19,
The step of calculating the initial capacity of the newly distributed distributed power supply capable of being linked based on the power distribution line unit,
A capacity obtained by subtracting the capacity of the distributed power source existing at each node of the distribution line to be connected with the new distributed type power source from the distribution line type distributed power source capable capacity specified in the Technical Standard A method for estimating the capacity of a distributed power source capable of linking. 23. The method of claim 21,
And comparing the calculated initial capacity of the bank unit with the calculated initial capacity of the distribution line to determine a smaller value as the initial capacity. 19. The method of claim 18,
Wherein the step of calculating the maximum voltage value comprises:
Calculating a voltage for each node existing in the distribution line by performing algae calculation on the assumption that the existing distributed type power source is maximally generated based on the information collected in the step of collecting the information, And determining the capacity of the distributed power source capable capacity. 24. The method of claim 23,
Wherein the step of calculating the maximum voltage value comprises:
And calculating a reflected voltage to calculate a voltage for each node existing in the distribution line by performing algae calculation on the assumption that the new dispersed type power source having the initial capacity and the existing distributed type power source achieve maximum power generation Wherein the distributed power supply linkable capacity calculation method comprises: 27. The method of claim 24,
The step of estimating the final capacity comprises:
And comparing the maximum voltage value, which is the maximum voltage among the voltages calculated by the node, calculated in the step of calculating the coupled reflected voltage, with the upper limit voltage value. 26. The method of claim 25,
The step of estimating the final capacity comprises:
After the comparing step,
When the maximum voltage value is larger than the upper limit voltage value,
A base voltage value, which is a voltage of the same node as the node having the maximum voltage value, and a base voltage value, which are calculated from the initial capacity, the maximum voltage value, and the unacknowledged voltage, Further comprising the step of converting the capacity of the distributed power source capable capacity. 26. The method of claim 25,
The step of estimating the final capacity comprises:
After the comparing step,
When the maximum voltage value is equal to or less than the upper limit voltage value,
Further comprising the step of determining the initial capacity as the final capacity which is the maximum capacity that can be connected to the new distributed type power supply. 19. The method of claim 18,
After the step of estimating the final capacity,
The final capacity calculated in the step of calculating the final capacity may be displayed by displaying the final capacity for each node of the distribution line through the single line or displaying the final capacity for each node of the distribution line through the report format Of the distributed power supply capable capacity.

Images